Turret lathe



FILED JULY 14, 1919, 5 SHEETS-SHEET l TTVV. PARSONS.

Feb. 6, 1923.A

F. W. PARSONS. TURRET LATHE. FILED JULY 14.

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5 sHEETs-sHEET 4 F. w. PARSONS. TuRRr-:T LATHE. FILED JULY 14, 1919.

Feb. e, 11923.

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5 SHEETS-SHEET 5 F. W. PARSONS Feb. 6, 1923.

TURRET LATHE.

EILED JULY 14. 1919.

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Application filed Jury 14,

Be it known that FREDERICK W. PARSONS, citizen of the United States, residing Cleveland, in the county of Cuyahoga and Sta-te or Ohio, has invented certain new'and useful Improvements in Turret Lathes, of which the following is a speciii'cation.

ThisA invention relates more particularly to 'an improvement in turret lathes, and the general object of the invention is to provide anorganization or' part-s adapted to expedite and cheapen the production of lat-he Work by simplifying the operations and eliminating all unnecessary movements on the part of i the operator.

The conception involves the use oi a reciprocal slide upon which a turret is adapted to be automatically rotated, either partly or completely, by merely reciprocating the slide away from and toward the work. Simple Vadjustable means are also provided to determine the degree of rotation of the turret, the extent of movement of the 'slide for each tool in the turret, and the force to be stored and supplied to rotate the turret predetermined degree.

In the drawings accompanying this appli-A cation, Fig. 1 is a side view ot a latheem-v bodying my improvnnent,y and Fig.y 2 is an enlarged ytop view of the slide and turret constructed according to my invention. Fig'; is a longitudinal vertical section on the center line of the saddle slide and turret, andA Fig. 4 isa longitudinal vertical section on line 1-4, Fig. 11 showing the adjustable stop devices for limiting the movement of the slide' and turret toward the work. Figf. 5v is a top plan and sectional view of the turret operating mechanism, the outlines of the saddle, slide and turret being shown in dotted lines. Fig. 6 is a longitudinal vertical section of the saddle, slide and a portion of the turret,`approximately on line 6 6, Fig. 5. Fig. 7 is a plan view of the gears and parts which rotate the turret, thefull and dotted'lines indicating different working positions and the degree of moment required toc'ompress the spring for rotating the turret. Fig'. 8 is a view corresponding to Fig. 6 butv with the slide and parts carried thereby in a different position on the saddle and with the turret' bolt withdrawn and the compressing. device for the spring about tobe released.v Fig.'9 is a side elevation and part sectional view of the turret stop mechanism, and Fig. 10 is a cross section on line 10-10, Fig. 9.

1919. Vserial No. 310,671.

Fig.A 11is bottom 'or inverted view of the slide and parts therein. Fig.- v12 is aside.

View the turret: and stop pins. v The invention may be incorporatedA in any lathe wherein a't-urre't isv employed,-and Fig.

lillustratesthe application of theinvention to a lathe havin-g shears ora bed 2 carryinga headstoclr which embodiesga cone pulley d and. a chuck 5 through which the stock vorv work is fed `toward and yagainst a stop or tool in a rotatable' turret 7 Ywhich is mountthe turret ho'ldsastop member 12-as Well -las drilis,tap's or other tools,` and this stopffmem'-A beris adapted tobe Vstationed.opposite the work, represented in F ig. 2-by a rodvlifi, After this rod has beenfed againstthe end of ,.stop II,1ember 12 and Vis at rest the operator merelypresses leverl-O to the right which moves the slide and turretrtogether away from, the rod. During this 1 retiriI-ig` movef ment of the slide a tapered locking bolt 15'- is withdrawn from engagementlvvith the.

bottoni of the turret, a heavy coiled spring 1 6 is 4compressed to store uppower to rotate the turret, and a checkpawl 17 is released-to permit vthe compressed spr-ing to-rotate the turretthrough the' medium of a ratchet mem'- ber 18 and aJ set of spur gears 19, 2O and 21, see Figs. 3,5, 7 and 8. j j

Turret 7 is providedw'ithaseries of lsock-y ets l 22 radially therein for the 'toolsjand clampingv bolts 23' extend downwardly. from the top ofthe turret to secure thet'ools inthe sockets, and vthe'turret is sleeved 4over yand clamped or keyed'to a' short vertical shaft 2d rotatablymounted inga bea-ring in the uppervsidegofslide 8.` 'The lower reduced end or" shaft 24 carries ay sp-iralgear. 25 and theV small gearor pinion 21, theY spiral gear meshing with a second spiral gear27 ena longitudinal shaft 28 at one side and within slideI 8. Pinion 21jmeshes with alarger spur gear 20 suspended within the slide von ay screw shaft 29, and rot-ationof Agea-r2()vk is, through andI by ,gear 19 which is supported kso iloV

" idle movement of dog 31 during part of this retiring movement of the slide so that the dog or dogs will take hold on anew tooth or set of teeth on ratchet member 18. To bring this result about a link 32 connects ratchet member 18 with a small cross-head 33 which is sleeved to Slide on an adjusting screw 34 having rotatable bearing at its outer r`end in an end plate 35 affixed to or forming part of slide 8, and the coiled spring 16 is also? sleeved on screw 34 and interposed between cross-head 33 and a nut 35 at the inner end of the screw. Thus, when the slide retires it carries the gears, link and cross-head with it, together with pawl 17 which is pivotally connected to the crosshead and adapted to trail its free hookshaped end over the top side of saddle 9 until afvvertical shoulder 36 on a stop piece affixed to the saddle is engaged by the hook 37, see Figs. 5 to 8,l inclusive. The movement of cross-headl 33 is arrested as soon as hook 37 engages shoulder 36 but slide 8 moves on to the right and by so doing the spring 16 is compressed because the adjusting 'screw and its nut 35 is also carried onward with the slide, and in this interval of movement stud 30 carries ratchet member 18 with the slide while link 32 is arrested or at 4a standstill thereby giving said ratchet member a partial turn without rotating gear 19. In brief, the spring is now compressed and the ,ratchet mechanism set t'o turn the gears and turret the instant hook 37 is released from Ashoulder 36. Such release is effected when the beveled end of a piece on saddle 9, thus lowering the front end of the lever and bolt 15 which has a socket or pivotal connection therewith, see

Fig. 8.

The travel of the slide is relatively short in compressing the spring and in'releasing hook 37 of pawl'17 to permit the spring to act, and only a partial rotation is given to ratchet member 18 by link 32 under the impulse of the spring when release of pawl 17 is effected. On the other hand the turret is `adapted to be rotated a full turn or more by the small pinion'QI'which is driven by the larger gears 19 and 20, although in practice the turret is usually only rotated partially, that is, stepv by step to bring the different tools in the turret successively opposite the work and with the turret always rotating in the same direction.

The stopping of the `turret to align rany given tool or set of tools successively with the work is a matter of election on the part of the operator prior toor during operations. That is, the operator may select and depress one or more stop pins 41 in the rim 42 of the turret so that the lower end of each depressed pin willv come successively into contact with the raised projection 43'ofa latch 44 which is pivoted upon one side of. slide 8, see Figs. 9 and 10. Theupper endv of each pin 41 is grooved annularly in two places toseat a spring-pressed detent k45 housed within the side of the turret, and each pin'may be raised or lowered andthereafter held in either position by the detenvt.

At the beginning of the rotation ofthe turret the pinV 41 rests upon the upper side of the latch projection 43 as shown vin Fig. 9 to permit the turret to be rotated, and this relationship of parts is established aftel' each rotatable movement of the turret.

Briefly, the latch must act to engage the pinl sion spring 47 carries the latch for-ward andy tilts it also to place its projection 43 in theL path vof a turret pin 41 as soon as the turret begins i to revolve. Then when the pin strikes the projection the latch is forced backv theI length of its pivot slot and theparts remain in this position until a depending roller 49 on the latch engages a stationary member 50 on bracketl 11, thereby tilting and freeing the latch fromthe pin and permit,-V

tingsprin'g 47 to draw the latch forward and placing its projection 43 underneath the pin.` Depression of one turret stop pin 41 will. limit. the rotation of the turret 4to one com-` plete turn, and depression of two stop pins diametrically opposite each other will limit the turret to successive turning movements of one-hundred and eighty degrees. Each tool in the turret has a corresponding stop pin and any tool or succession of tools may be halted opposite the work by depressing the proper pinsbeforchand and theturrety may be permitted to rotate either uniforml or different distances successively.

The work rotates in the fixed position as predetermined. and slide 8 and the various tools in the turret are advanced successively placement oi' a broken mes-,eee-

in varying degree in respect to tlie- 'work a'ccording to predetermii'iecl requirements and each tool in the turret is positively stopped at a predetermined. point during its reed' or forward movement toward the head stock.

This resultV is accomplished by rotzrtingv a series oi' adjustable stop screws 5l-'- in a circle opposite a stop-plate -52-` on sad-'die 9' coincidently and in the saine degree as the turret. Thus the stop screws 51 correspond in number and radial position to the number of or places for tools in the turret all the stopscrews are mountedin and extend through a cylinder ,53 which is carrie-'d 'with`- in and by slide 8 and driven by the longitudinal shaft 28 and the spiral gears' 25 and 27. The outer wrench-engaging ends of the stop screws are exposedat the rearend of the slide and each stop screw may be separately adjusted and set of the slide and distance of travel of the tool within or over the'work.

The head oi adjusting screw 34 is also eX- pS'ed at the outer end oi' the slide, and SpringV 16 may be given any ydesired tension by rotating sciew`34. The "change" in tension is brought about by the travel of nut 35 on thelscrew 34 and the nut is prevented from rotating by a4 short screw orpin 55 sliding' in a slot 56, s'ee Figs. 3 and 11. One end oi' the spring 1,6 is also sleevedover a tubular screw 57 which is removably mounted on cross head 33 so that repairs and reorf weak springjcan be easily accomplished or removing the slide from the' saddle.

In operation, each. movement `or the lende away from the work will 'first' cause the' locking bolt to be withdrawn from the turret, then hook 37 engages 'shoulder 36 and spring 16 is compressed and the ratchet member 18 rotated to an eiiective operating position. Trip lever 39 then releases hook 37 and the spring expands and rotates the gears and turret and the stop screw cylinder 53 is also rotated. The degree oi rot-ation of both said turret and cylinder is dependent upon the particular turret stop pin l1 which has been dep-ressed or lowered in advance to engage latch 44, but the instant astop-pin is engaged the latch is pressed back a short disf tance and then the turret is brought to a rest position with the desired tool opposite the work and with a stop screw 51 corresponding to that tool in linel with stop plate 52. The movement of hand lever 10 is now reversed and slide 8 moved forwardly as far as the stop screw 51 will permit and in the initial stages of this movement the turret locking bolt 15 is raised into one of the series of bolt openings in the bottom side of the turret to lock the turret and align the working tool opposite the work.

Upliit of bolt 15 is caused by a spring 54 to lim-'itthe forward travelA rthe turret and thereby" the without dismantling' connection with Whichbears down upon" the beveled-end oftri'p lever 39 'and 'the action `occurs soon as the beveled end of the leverrides 'ir'ee from the slopingy portion 40' ofi the stop piece on saddle 9, Aksee Fig. 8. The vnext part vactuated in the forward Amovement oi slide 8 which is tiltedwhen its depending Ak roller 49engagesthe' stationary member 50 whereupon spring'fl?v draws the `iatch forward un' derneath the stop pin on the' turret thereby releasing the turret ifofri'urther rotation and permitting a repetition election oi' the operator.

l. Ina lathe, a slide and a to'ol holding turret, ratchet `gear mechanism adapted tov rotate saidtu'rret in variable degree, adjust'- able stops adapted to limitthe degree loi rotation of said turret, and a spring adapted to operate said gear mechanism.

2. In a lathe, a saddleA and a reciprocable slide thereon anda tool-holdingturret, pinion and ratchet gearing adaptedto rotate said turret invariable degree, radialiy' spaced stop vmembers adapted to limit the degree oi rotation of said turret, and means operable by the movement oi' said siide adapted to'- rotate said gearing.

3. In alathe, a slide andlever vadaptedto reciprocate the same, va tooleholding 'turret mounted uponA said siide, a series oi stop pins forsaid turret, gears and a ratchet member and a spring. adapted torotate ysaid turret in variable' degree and means' adapted' to' set said spring for actionduring the reciprocal movement'of said slide. j f

4, In a lathe, a reciprocable slide .with al tool-holding turret mou`n ted' thereon, 'stop pins radially oi' said turret adapted to fix the degree of rotationy oi `said turret, and compressible spring means operable by the movement of said slide having pinion and gear mechanism adapted to rotate said turret in variable degree.

5. In a lathe, a reciprocable slide, va rotoward the work is latch s or operations at the llO.

slide, adjustable stop means adapted to limit the degree or" rotation of said turret, ratchet and pinion gearing and a compressible spring adapted to rotate said turret invari able degree, said spring slide.

6. In a lathe, a reciprocable slide, a toolholding turret supported upon said slide, ratchet gear mechanism adapted to rotate said turret, a power spring having operative said mechanism, a check' member adapted to store up energy in said spring during areciprocable movement of said slide, andmeans adapted to release said check member to eect rotation of said turret by said spring and ratchet mechanism.

7. In a lathe, a reciprocable slide, a ro-` and means adapted to compress tatable turret mounted on said slide, a compressible spring and ratchet and gear'meansA limit the movement of said slide.

8. In a lathe, a rotatable turret, a set of adjustable stop members parallel.v to the axis of said turret, means adapted to' rotate said turret, and a latch adapted to co-act With Ysaid members in limiting the rotation ot the turret.

9. n a lathe, a rotatable turret having stops adapted to be set inl different positions, and a pivoted latch adapted to engage selected stops successively to limit the rotation ol they turret. i

10. In a lathe, a rotatable turret, depressible stop pins carried by lsaid turret, and a latch adapted to engage selected pins and to effect self-release therefrom. i

11. In a lathe, a reciproc'able slide and a rotatable turret thereon, a set or' stop members carried by saidv turret, a latch adapted to engage said stop members successively, and means adaptedv to effect release ot' said latch from said stop members upon movement ot'said slide. ,l

12.', InA a lathe, a turret having a set of stop pins, a slide for said turret, a movable latch mounted on said slide vadaptedy to be engaged by said pins, and a stationaryl device adapted to actuate said latchv and effect release there-- ot' from an engaged pin.

13. In a lathe, a turret having a set oit select-ive stop pins radially thereon, a reciprocable slide carrying said turret, a tilting spring-controlled latch adapted "to engage selected pins, and a saddle supporting said slide having means thereon adapted to tilt said latch upon 'a reciprocal movement ctV said slide. A

14C. In a lathe, a

lective stop members for said turret, a latch y turret, means adapted to` rotate said turret intermittently, a seto't se?4k adapted to be engaged by said stopmembers successively, a slide carrying said turret and check member for said cross head, and means adapted to release said check member.

16. ln a lathe, a slide and a turret thereon,

and mechanism adapted lto revolve saidr turret at'intervals by the movement of thek slide, v,comprising a spring and means for adjustably changing the tension of said spring.

17. In a lathe, a movable slidel and a rotat-A and mechanism adapted' able turret thereon, to rotate said turret intermittently by the movement of the slide comprising a spring, and an adjusting bolt and nut and a compression 'member for the spring.

` 18. In a lathe, a slide anda turret thereon, and means adaptedv to rotate said turret by the movement ot the slide, comprising a spring, an adjusting screw for changing the tension ot the spring, and a removable andl replaceable backing member for the 'spring sleeved upon Lsaid screw.

Signed ahoga, and State ot' Ohm/this 25th day of June, 1919.

i e FREDERICK W. PARSONS.

said slide.

at Cleveland, inthe county of Cuy- 

